Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '283e81ec80b169ecc12b5e849d7dc549effd2cccbaa0d365a59eb7ac3e1df84f' 
  AND token = 't+C+LbXI2nco8QQusSKG2w6LlzEEyzz4fIaIZiH36gI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}